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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">mgssuvest</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник МГСУ</journal-title><trans-title-group xml:lang="en"><trans-title>Vestnik MGSU</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1997-0935</issn><issn pub-type="epub">2304-6600</issn><publisher><publisher-name>Moscow State University of Civil Engineering (National Research University) (MGSU)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.22227/1997-0935.2024.5.752-762</article-id><article-id custom-type="elpub" pub-id-type="custom">mgssuvest-268</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Проектирование и конструирование строительных систем. Строительная механика. Основания и фундаменты, подземные сооружения</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Construction system design and layout planning. Construction mechanics. Bases and foundations, underground structures</subject></subj-group></article-categories><title-group><article-title>Расчет фибробетонного блока в составе локально усиленных узлов ферм из гнутосварных профилей</article-title><trans-title-group xml:lang="en"><trans-title>Calculation of a fibre concrete block as a part of locally reinforced truss nodes made of square hollow sections</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1728-1825</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гимранов</surname><given-names>Л. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Gimranov</surname><given-names>L. R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Линур Рафаилевич Гимранов — кандидат технических наук, доцент</p><p>420043, г. Казань, ул. Зеленая, д. 1</p><p>РИНЦ AuthorID: 745548, Scopus: 57210968788</p></bio><bio xml:lang="en"><p>Linur R. Gimranov — Candidate of Technical Sciences, Associate Professor</p><p>1 Zelenaya st., Kazan, 420043</p><p>RISC AuthorID: 745548, Scopus: 57210968788</p></bio><email xlink:type="simple">leenuur@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гайнетдинов</surname><given-names>Р. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Gainetdinov</surname><given-names>R. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ришат Габдулхаевич Гайнетдинов — кандидат технических наук, ассистент</p><p>420043, г. Казань, ул. Зеленая, д. 1</p><p>РИНЦ AuthorID: 1111543</p></bio><bio xml:lang="en"><p>Rishat G. Gainetdinov — Candidate of Technical Sciences, assistant</p><p>1 Zelenaya st., Kazan, 420043</p><p>RISC AuthorID: 1111543</p></bio><email xlink:type="simple">rishat.gajnetdinov@bk.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2870-4195</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хайруллин</surname><given-names>Л. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Khairullin</surname><given-names>L. R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ленар Равилевич Хайруллин — кандидат технических наук, доцент</p><p>420043, г. Казань, ул. Зеленая, д. 1</p><p>Scopus: 57188837651</p></bio><bio xml:lang="en"><p>Lenar R. Khairullin — Candidate of Technical Sciences, Associate Professor</p><p>1 Zelenaya st., Kazan, 420043</p><p>Scopus: 57188837651</p></bio><email xlink:type="simple">lenarhay@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Пажвак</surname><given-names>Абдурахман</given-names></name><name name-style="western" xml:lang="en"><surname>Pazhwak</surname><given-names>Abdurahman</given-names></name></name-alternatives><bio xml:lang="ru"><p>Абдурахман Пажвак — аспирант</p><p>420043, г. Казань, ул. Зеленая, д. 1</p></bio><bio xml:lang="en"><p>Abdurahman Pazhwak — postgraduate student</p><p>1 Zelenaya st., Kazan, 420043</p></bio><email xlink:type="simple">pazhwak_2008@yahoo.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Казанский государственный архитектурно-строительный университет (КГАСУ)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Kazan State University of Architecture and Engineering (KSUAE)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>29</day><month>05</month><year>2024</year></pub-date><volume>19</volume><issue>5</issue><fpage>752</fpage><lpage>762</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Гимранов Л.Р., Гайнетдинов Р.Г., Хайруллин Л.Р., Пажвак А., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Гимранов Л.Р., Гайнетдинов Р.Г., Хайруллин Л.Р., Пажвак А.</copyright-holder><copyright-holder xml:lang="en">Gimranov L.R., Gainetdinov R.G., Khairullin L.R., Pazhwak A.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.vestnikmgsu.ru/jour/article/view/268">https://www.vestnikmgsu.ru/jour/article/view/268</self-uri><abstract><sec><title>Введение</title><p>Введение. Приведено аналитическое и численное исследование узлов ферм из гнутосварных профилей (ГСП) с локальным заполнением из фибробетона (ФБ). Выполнен анализ численного расчета фибробетонного элемента как балки на упругом основании в качестве локального усиления узлов ферм из ГСП под действием сосредоточенной нагрузки от примыкающего раскоса. Несущая способность узла с непосредственным примыканием раскосов к поясам ферм из ГСП практически полностью определяется геометрией и физико-механическими характеристиками элементов ферм.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. Применяется метод исследования, основанный на численном моделировании локального усиления узла ФБ. Материалы для узлов: пояс и раскосы узла — сталь марки С345 и С255, соответственно по ГОСТ 27772–2015 с расчетным сопротивлением 340 и 240 МПа, локальное заполнение — ФБ с модулем упругости не ниже 27 000 МПа и расчетным сопротивлением сжатию Rb = 11,5 МПа.</p></sec><sec><title>Результаты</title><p>Результаты. Получены уравнения, на основе которых можно анализировать коэффициент податливости основания фибробетонного блока как балки на упругом основании. Разработаны уравнения, на основе которых можно проанализировать коэффициент относительной изгибной жесткости для установления коэффициента податливости основания блока, предложена методика расчета фибробетонного блока на основе теории балки на упругом основании.</p></sec><sec><title>Выводы</title><p>Выводы. Значимость полученных результатов для строительной отрасли состоит в том, что рассмотрены возможные подходы к определению разных методов расчета фибробетонного блока в составе усиленных узлов ферм из ГСП, что позволит снизить металлоемкость и деформативность. Результаты, полученные при численных исследованиях коэффициента податливости основания фибробетонного блока, а также с использованием программного пакета АNSYS показали, что они близки к результатам расчета коэффициента жесткости фибробетонного блока.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Introduction</title><p>Introduction. Analytical and numerical study of truss nodes made of square hollow sections (SHS) with local fibre concrete filling is presented. The analysis of numerical calculation of a fibre concrete element as a beam on an elastic base as a local reinforcement of a truss node made of SHS under the action of the concentrated load from the adjacent strut is performed. The bearing capacity of a node with the direct adjacency of struts to the chords of trusses made of S+HS is almost completely determined by geometry and physical and mechanical characteristics of truss elements made of SHS. With the cross-section of the elements selected on the basis of the calculation of the bars, the load-bearing capacity of K-type connections may not be ensured. In this case it is possible to change the dimensions of the cross-section of a truss node made of square hollow sections. In the existing Russian normative documents, there is no data on the calculation and design of reinforcement of truss nodes made of square hollow sections by filling with concrete. In this connection, it is important to develop simple and reliable methods of strengthening such nodes, as well as appropriate methods of their calculation. The purpose of the work is to develop a methodology for calculating the fibre concrete block of analytical dependencies to determine the bearing capacity under concentrated load.</p></sec><sec><title>Materials and methods</title><p>Materials and methods. The research method based on the numerical modelling of local reinforcement of the node with fibre concrete is used. Materials for the nodes: chord and struts of the node — steel of S255 grade according to GOST 27772–2015 with design resistance 240 MPa, local filling — fibre concrete with elastic modulus not lower than 27,000 MPa and design resistance to compression Rb = 11.5 MPa.</p></sec><sec><title>Results</title><p>Results. The main results of the work consist in the analytical study of truss nodes made of square hollow sections locally reinforced with fibre concrete block, the development of a method for calculating the fibre concrete block as a beam on an elastic base based on the results of numerical experiments in the software package АNSYS.</p></sec><sec><title>Conclusions</title><p>Conclusions. The significance of the obtained results for the construction industry consists in the fact that the possible approaches to the definition of different methods of calculation of fibre concrete block as a part of reinforced nodes of trusses made of square hollow sections were considered in order to reduce metal consumption and deformability. The results obtained in numerical studies of the base stiffness factor of fibre concrete block and the results obtained using the software package АNSYS showed that they are close to the results of calculating the stiffness factor of fibre concrete block in locally reinforced nodes of trusses made of square hollow sections reliably.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>численный анализ</kwd><kwd>узел</kwd><kwd>фибробетон</kwd><kwd>стальная ферма</kwd><kwd>усиление</kwd><kwd>гнутосварной профиль</kwd><kwd>несущая способность</kwd><kwd>компьютерное моделирование</kwd></kwd-group><kwd-group xml:lang="en"><kwd>numerical analysis</kwd><kwd>node</kwd><kwd>fibre concrete</kwd><kwd>steel truss</kwd><kwd>reinforcement</kwd><kwd>square hollow section</kwd><kwd>bearing capacity</kwd><kwd>computer modelling</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Патент RU № 2793503. Способ усиления узла верхнего пояса решетчатой конструкции из трубчатых профилей / Гимранов Л.Р., Гайнетдинов Р.Г., Пажвак А.; заявл. № 2022129975 от 18.11.2022. Бюл. № 10.</mixed-citation><mixed-citation xml:lang="en">Patent RU No. 279350304. Method for strengthening upper chord node of a lattice structure made of tubular profiles / Gimranov L.R., Gainetdinov R.G., Pazhwak A.; appl. No. 2022129975 18.11.2022. Bul. No. 10.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Зинькова В.А. Методика экспериментальных исследований узловых соединений трубчатых элементов фермы // Вестник БГТУ им. В.Г. Шухова. 2012. № 1. С. 50–51. EDN OPGHQL.</mixed-citation><mixed-citation xml:lang="en">Zinkova V.A. Methodology of experimental research of nodal joints of tubular truss elements. Bulletin of BSTU named after V.G. Shukhov. 2012; 1:50-51. EDN OPGHQL. (rus.).</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Gimranov L., Kuznetsov I. Locally concrete filled reinforced joints of RHS and SHS trusses // Proceedings of STCCE. 2021. Pp. 58–71. DOI: 10.1007/978-3-030-80103-8_7</mixed-citation><mixed-citation xml:lang="en">Gimranov L., Kuznetsov I. Locally concrete filled reinforced joints of RHS and SHS trusses. Proceedings of STCCE. 2021; 58-71. DOI: 10.1007/978-3-030-80103-8_7</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Xu W., Han L., Tao Z. Flexural behaviour of curved concrete filled steel tubular trusses // Journal of Constructional Steel Research. 2014. Vol. 93. Pp. 119–134. DOI: 10.1016/j.jcsr.2013.10.015</mixed-citation><mixed-citation xml:lang="en">Xu W., Han L., Tao Z. Flexural behaviour of curved concrete filled steel tubular trusses. Journal of Constructional Steel Research. 2014; 93:119-134. DOI: 10.1016/j.jcsr.2013.10.015</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Hou C., Han L.-H., Zhao X.-L. Behaviour of circular concrete filled double skin tubes subjected to local bearing force // Thin-Walled Structures. 2015. Vol. 93. Pp. 36–53. DOI: 10.1016/j.tws.2015.03.004</mixed-citation><mixed-citation xml:lang="en">Hou C., Han L.-H., Zhao X.-L. Behaviour of circular concrete filled double skin tubes subjected to local bearing force. Thin-Walled Structures. 2015; 93:36-53. DOI: 10.1016/j.tws.2015.03.004</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Гимранов Л.Р., Пажвак А. К определению напряженно-деформированного состояния бетонного блока в составе усиленного узла фермы из гнуто-сварных профилей // Известия КГАСУ. 2022. № 4 (62). С. 51–60. DOI: 10.52409/20731523_2022_4_51. EDN LGZNAO.</mixed-citation><mixed-citation xml:lang="en">Gimranov L.R., Pazhwak A. Determination of the stress-strain state of a concrete block as part of a reinforced node truss from square hollow sections. News Kazan State University of Architecture and Engineering. 2022; 4(62):51-60. DOI: 10.52409/20731523_2022_4_51. EDN LGZNAO. (rus.).</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Кикин А.И., Санжаровский Р.С., Трулль В.А. Конструкции из стальных труб, заполненных бетоном. М. : Стройиздат, 1974. 145 с.</mixed-citation><mixed-citation xml:lang="en">Kikin A.I., Sanzharovsky R.S., Trull V.A. Structures from steel pipes filled with concrete. Moscow, Stroyizdat Publ., 1974; 145. (rus.).</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Кузнецов И.Л., Салахутдинов М.А., Гайнетдинов Р.Г. Исследование напряженно-деформированного состояния болтового узла соединения из холодногнутых тонкостенных профилей // Вестник МГСУ. 2019. Т. 14. № 7. С. 831–843. DOI: 10.22227/1997-0935.2019.7.831-843</mixed-citation><mixed-citation xml:lang="en">Kuznetsov I.L., Salakhutdinov M.A., Gainetdinov R.G. Investigation of the stress-deformation state of a bolt-joint assembly of cold-bent thin-walled profiles. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2019; 14(7):831-843. DOI: 10.22227/1997-0935.2019.7.831-843 (rus.).</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Казакова Е.В. Анализ напряженно-деформированного состояния бесфасоночных узлов легких ферм // Сборник научных трудов Донецкого института железнодорожного транспорта. 2019. № 53. С. 36–40. EDN JXVGBP.</mixed-citation><mixed-citation xml:lang="en">Kazakova E.V. Analysis of the stress-deformation state of the facetless units of light farms. Collection of Scientific Papers of the Pre-University. 2019; 53:36-40. EDN JXVGBP. (rus.).</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Sakai Y., Hosaka T., Isoe A., Ichikawa A., Mitsuki K. Experiments on concrete filled and reinforced tubular K-joints of truss girder // Journal of Constructional Steel Research. 2004. Vol. 60. Issue 3–5. Pp. 683–699. DOI: 10.1016/s0143-974x(03)00136-6</mixed-citation><mixed-citation xml:lang="en">Sakai Y., Hosaka T., Isoe A., Ichikawa A., Mitsuki K. Experiments on concrete filled and reinforced tubular K-joints of truss girder. Journal of Constructional Steel Research. 2004; 60(3-5):683-699. DOI: 10.1016/s0143-974x(03)00136-6</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Packer J.A., Wardenier J., Zhao X.L., Vegte G.J., Kurobane Y. Design guide for Rectangular hollow section (RHS) joints under predominantly static loading // CIDECT. 2009.</mixed-citation><mixed-citation xml:lang="en">Packer J.A., Wardenier J., Zhao X.L., Vegte G.J., Kurobane Y. Design guide for Rectangular hollow section (RHS) joints under predominantly static loading. CIDECT. 2009.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Gimranov L.R., Pazhwak A. To the determination of the stress-strain state of a concrete block as part of a reinforced node truss from square hollow sections // International Journal of Advanced Academic Studies. 2022. Vol. 4. Pp. 135–139.</mixed-citation><mixed-citation xml:lang="en">Gimranov L.R., Pazhwak A. To the determination of the stress-strain state of a concrete block as part of a reinforced node truss from square hollow sections. International Journal of Advanced Academic Studies. 2022; 4:135-139.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Nawrot J. An analytical and numerical assessment of the load capacity of the K-joint of flat steel trusses // Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo. 2020. Vol. 175. Issue 25. Pp. 168–173. DOI: 10.17512/znb.2019.1.26</mixed-citation><mixed-citation xml:lang="en">Nawrot J. An analytical and numerical assessment of the load capacity of the K-joint of flat steel trusses. Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo. 2020; 175(25):168-173. DOI: 10.17512/znb.2019.1.26</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Mazon A.A., Sarmanho A., Nunes G., Roquete L., Neiva L.H., Souza F. Numerical analysis of truss systems with stiffened flattened end-bars // Latin American Journal of Solids and Structures. 2018. Vol. 15. Issue 3. DOI: 10.1590/1679-78254119</mixed-citation><mixed-citation xml:lang="en">Mazon A.A., Sarmanho A., Nunes G., Roquete L., Neiva L.H., Souza F. Numerical analysis of truss systems with stiffened flattened end-bars. Latin American Journal of Solids and Structures. 2018; 15(3). DOI: 10.1590/1679-78254119</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Thejeel M.M., Shallal M.A. Performance of concrete-filled steel tube truss girders strength by adding reinforcement // IOP Conference Series: Materials Science and Engineering. 2020. Vol. 870. Issue 1. P. 012098. DOI: 10.1088/1757-899x/870/1/012098</mixed-citation><mixed-citation xml:lang="en">Thejeel M.M., Shallal M.A. Performance of concrete-filled steel tube truss girders strength by adding reinforcement. IOP Conference Series: Materials Science and Engineering. 2020; 870(1):012098. DOI: 10.1088/1757-899x/870/1/012098</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Huang W., Lai Z., Chen B., Yao P. Experimental behavior and analysis of prestressed concrete-filled steel tube (CFT) truss girders // Engineering Structures. 2017. Vol. 152. Pp. 607–618. DOI: 10.1016/j.engstruct.2017.09.035</mixed-citation><mixed-citation xml:lang="en">Huang W., Lai Z., Chen B., Yao P. Experimental behavior and analysis of prestressed concrete-filled steel tube (CFT) truss girders. Engineering Structures. 2017; 152:607-618. DOI: 10.1016/j.engstruct.2017.09.035</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Jin D., Hou C., Shen L., Han L.H. Numerical investigation of demountable CFST K-joints using blind bolts // Journal of Constructional Steel Research. 2019. Vol. 160. Pp. 428–443. DOI: 10.1016/j.jcsr.2019.05.046</mixed-citation><mixed-citation xml:lang="en">Jin D., Hou C., Shen L., Han L.H. Numerical investigation of demountable CFST K-joints using blind bolts. Journal of Constructional Steel Research. 2019; 160:428-443. DOI: 10.1016/j.jcsr.2019.05.046</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Thejeel M.M., Shallal M.A. Performance of concrete-filled steel tube truss girders strength by adding reinforcement // IOP Conference Series: Materials Science and Engineering. 2020. Vol. 870. Issue 1. P. 012098. DOI: 10.1088/1757-899x/870/1/012098</mixed-citation><mixed-citation xml:lang="en">Thejeel M.M., Shallal M.A. Performance of concrete-filled steel tube truss girders strength by adding reinforcement. IOP Conference Series: Materials Science and Engineering. 2020; 870(1):012098. DOI: 10.1088/1757-899x/870/1/012098</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Han L.H., Xu W., He S.H., Tao Z. Flexural behaviour of concrete filled steel tubular (CFST) chord to hollow tubular brace truss: experiments // Journal of Constructional Steel Research. 2015. Vol. 109. Pp. 137–151. DOI: 10.1016/j.jcsr.2015.03.002</mixed-citation><mixed-citation xml:lang="en">Han L.H., Xu W., He S.H., Tao Z. Flexural behaviour of concrete filled steel tubular (CFST) chord to hollow tubular brace truss: experiments. Journal of Constructional Steel Research. 2015; 109:137-151. DOI: 10.1016/j.jcsr.2015.03.002</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Yang W., Yan R., Suo Y., Zhang G., Huang B. Experimental study on hysteretic behavior of the overlapped k-joints with concrete filled in chord // Applied Sciences. 2019. Vol. 9. Issue 7. P. 1456. DOI: 10.3390/app9071456</mixed-citation><mixed-citation xml:lang="en">Yang W., Yan R., Suo Y., Zhang G., Huang B. Experimental Study on Hysteretic Behavior of the Overlapped K-joints with Concrete Filled in Chord. Applied Sciences. 2019; 9(7):1456. DOI: 10.3390/app9071456</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Feng R., Chen Y., Gao S., Zhang W. Numerical investigation of concrete-filled multi-planar CHS Inverse-Triangular tubular truss // Thin-Walled Structures. 2015. Vol. 94. Pp. 23–37. DOI: 10.1016/j.tws.2015.03.030</mixed-citation><mixed-citation xml:lang="en">Feng R., Chen Y., Gao S., Zhang W. Numerical investigation of concrete-filled multi-planar CHS Inverse-Triangular tubular truss. Thin-Walled Structures. 2015; 94:23-37. DOI: 10.1016/j.tws.2015.03.030</mixed-citation></citation-alternatives></ref><ref id="cit22"><label>22</label><citation-alternatives><mixed-citation xml:lang="ru">Chen Y., Feng R., Gao S. Experimental study of concrete-filled multiplanar circular hollow section tubular trusses // Thin-Walled Structures. 2015. Vol. 94. Pp. 199–213. DOI: 10.1016/j.tws.2015.04.013</mixed-citation><mixed-citation xml:lang="en">Chen Y., Feng R., Gao S. Experimental study of concrete-filled multiplanar circular hollow section tubular trusses. Thin-Walled Structures. 2015; 94:199-213. DOI: 10.1016/j.tws.2015.04.013</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
